Archives For single point of failure

The Mississippi River’s Old River Control Structure, a National Single Point of Failure?

Given the recent events in Fukushima and our subsequent western cultural obsession with the radiological consequences, perhaps it’s appropriate to reflect on other non-nuclear vulnerabilities. A case in point is the Old River Control Structure erected by those busy chaps the US Army Corp of Engineers to control the path of the Mississippi to the sea. Well as it turns out trapping the Mississippi wasn’t really such a good idea…

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On June 2, 2006, an American Airlines B767-223(ER), N330AA, equipped with General Electric (GE) CF6-80A engines experienced an uncontained failure of the high pressure turbine (HPT) stage 1 disk2 in the No. 1 (left) engine during a high-power ground run for maintenance at Los Angeles International Airport (LAX), Los Angeles, California.

To provide a better appreciation of aircraft level effects I’ve taken the NTBS summary description of the damage sustained by the aircraft and illustrated it with pictures taken of the accident by bystanders and technical staff.

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It appears that the underlying certification basis for aircraft safety in the event of a intermediate power turbine rotor bursts is not supported by the rotor failure seen on QF 32.

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